PL110320B1 - Method of metallic mercury removal from liquid medium - Google Patents

Method of metallic mercury removal from liquid medium Download PDF

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Publication number
PL110320B1
PL110320B1 PL1976192794A PL19279476A PL110320B1 PL 110320 B1 PL110320 B1 PL 110320B1 PL 1976192794 A PL1976192794 A PL 1976192794A PL 19279476 A PL19279476 A PL 19279476A PL 110320 B1 PL110320 B1 PL 110320B1
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PL
Poland
Prior art keywords
metallic mercury
mercury
particles
activated carbon
liquid medium
Prior art date
Application number
PL1976192794A
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Polish (pl)
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Publication of PL110320B1 publication Critical patent/PL110320B1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D15/00Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Water Treatment By Sorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Treating Waste Gases (AREA)
  • Removal Of Specific Substances (AREA)

Description

Przedmiotem wynalazku jest sposób usuwania czastek metalicznej rteci z zawierajacego je sro¬ dowiska, przy uzyciu wegla aktywnego o wyso¬ kiej powierzchni wlasciwej.Znane sa sposoby pozwalajace na usuwanie me¬ talicznej rteci z zawierajacego ja srodowiska, po¬ legajace na tym, ze gromadzi sie mechanicznie czastki rteci o wiekszych rozmiarach, np. przez dekantacje lub osadzanie w specjalnych zbiorni¬ kach. Gdy czastki rteci zawarte sa w srodowisku cieklym, mozna prowadzic flokulacje przy porno-* cy wodorotlenków metali zawartych w tym sro¬ dowisku lub dostarczanych do srodowiska w po¬ staci soli, przy czym czastki rteci grupuja sie pod¬ czas flokulacji i sa nastepnie oddzielane w zna¬ ny sposób.Niekiedy jednak rtec metaliczna znajduje sie w postaci czastek o szczególnie malych rozmia¬ rach, których w zaden sposób nie mozna zde- kantowac ani osadzic w okresie czasu, bedacym do przyjecia z przemyslowego punktu widzenia, lub w postaci czastek nieokludowanych przez wodorotlenki metali.Ma to czesto miejsce w przypadku oczyszcza¬ nia scieków przemyslowych, zawierajacych me¬ taliczna rtec w postaci zwiazków organicznych lub nieorganicznych, gdy oczyszczanie prowadzi sie przez redukcje zwiazku rteci do metalicznej rteci, np. pod dzialaniem dwóch metali o róz¬ nym charakterze, zanurzonych w oczyszczanym 30 roztworze o odpowiednio dobranej wartosci pH, przy czym metale te sa polaczone elektrycznie wewnatrz lub na zewnatrz fazy cieklej, jstk opi¬ sano we wloskim opisie patentowym nr 826615.Sposobem ujawnionym w tym opisie mozna otrzy¬ mywac ilosciowa konwersje zarówno organicz¬ nych jak i nieorganicznych zwiazków rteci, do¬ bierajac odpowiednio metale stosowane do re¬ dukcji (metal mniej szlachetny niz wodór i we¬ giel lub inny metal bardziej szlachetny niz wo¬ dór).Opisany sposób obróbki daje rtec metaliczna, która w pewnych przypadkach moze byc czescio¬ wo usunieta ze scieków, zwykle na drodze floku¬ lacji, o ile czastki rteci maja rozmiary nadajace sie do takiej obróbki.Sposób wedlug wynalazku pozwala usuwac rtec metaliczna z zawierajacego ja srodowiska cieklego, niezaleznie od rozmiaru czastek i rodza¬ ju wczesniejszej obróbki tego srodowiska, jak np. flokulacja lub koalescencja, i polega na kon¬ taktowaniu tego srodowiska z weglem aktywo¬ wanym o duzej powierzchni wlasciwej. Metaliczna rtee usuwa sie ilosciowo, a wegiel aktywowany, po nasyceniu regeneruje sie w znanej operacji regeneracji.Okreslenie „wegiel aktywowany" oznacza do¬ wolna postac wegla, charakteryzujaca sie wyso¬ ka zdolnoscia adsorbcji gazów, par i koloidal¬ nych cial stalych. Wegiel, zarówno pochodzenia 110 320110 320 3 roslinnego jak i zwierzecego, wytwarza sie przez destylacje materialów zawierajacych wegiel i na¬ stepnie odpowiednia aktywacje. Aktywacje pro¬ wadzi sie przez ogrzewanie w wysokiej tempera¬ turze (800—900°C), powodujacej powstanie jedno¬ rodnej struktury.Sposób usuwania czastek metalicznej rteci z za¬ wierajacego ja srodowiska cieklego polega na stykaniu'tego srodowiska z weglem aktywowanym o powierzchni wlasciwej wynoszacej ponad 250 m2/g- Srodowisko, z którego usuwa sie cza¬ stki metalicznej rteci stanowi zazwyczaj roztwór wodny zawierajacy kilka rozpuszczonych soli wraz z bardzo drobna zawiesina czastek metalicz¬ nej rteci do usuniecia.Sposób wedlug wynalazku realizuje sie zwykle w urzadzeniu, którego integralna czesc stanowi co najmniej jedna kolumna wypelniona weglem aktywowanym o powierzchni wlasciwej ponad 250 m*/g. Przez kolumne perkoluje roztwór wod¬ ny, przy czym czastki metalicznej rteci sa usuwa¬ ne ze srodowiska wodnego.Roztwór pochodzacy z operacji obróbki weglem aktywowanym, zawierajacy sole metali, takie jak np. sole zelaza w przypadku stosowania roztworu poddanego obróbce opisanej we wloskim opisie patentowym nr 826615, mozna stosowac jako tak^e do dalszego oczyszczania scieków przemyslowych, np. oczyszczania na drodze flokulacji, co sta¬ nowi istotna zalete sposobu wedlug wynalazku.Alternatywnie, gdy stezenie jonów metali jest ponizej zadanego stezenia granicznego, roztwór mozna spuszczac bez dalszej obróbki. W przeciw¬ nym razie, gdy roztworu nie stosuje sie do jakie¬ gos szczególnego sposobu obróbki, musi on byc przeslany do oczyszczalni aby zmniejszyc w nim stezenie soli metali do dopuszczalnej granicy.Przyklad. Scieki przemyslowe, zawierajace rózne stezenie metalicznej rteci, poddaje sie obróbce weglem aktywowanym o róznej powierz- 10 30 chni wlasciwej. Stosowane stezenia oraz otrzyma¬ ne wyniki pokazano w ponizszym zestawieniu.Wegiel aktywowany o powierzchni wlasciwej 1200 m2/g Stezenie rteci w dopro¬ wadzanych sciekach (mg/l) 3 4 4,8 5,4 Stezenie rteci w odpro¬ wadzanych sciekach (mikrogramów) mniej niz 2 mniej niz 2 mniej niz 2 mniej niz 2 Wegiel aktywowany o powierzchni wlasciwej 15 850 m2/g Stezenie rteci w dopro- Stezenie rteci w odpro- 20 Wegiel aktywowany o powierzchni wlasciwej 25 350 m2/g wadzanych sciekach (mg/l) 2 3 4 wadzanych sciekach (mikrogramów) mniej niz 2 mniej niz 2 mniej niz 2 Stezenie rteci w dopro¬ wadzanych sciekach (mg/l) 2 4 5 Stezenie rteci w odpro¬ wadzanych sciekach (mikrogramów) mniej niz 2 mniej niz 2 mniej niz 2 40 Zastrzezenie patentowe Sposób usuwania czastek metalicznej rteci z zawierajacego ja srodowiska cieklego, znamienny tym, ze srodowisko to kontaktuje sie z weglem aktywowanym o powierzchni wlasciwej wynosza¬ cej ponad 250 m2/g.PZGraf. Koszalin D-48 125 egz. A-4 Cena 45 zl PLThe subject of the invention is a method of removing metallic mercury particles from a medium containing them, using active carbon with a high specific surface. There are known methods that allow the removal of metallic mercury from an environment containing it, whereby it accumulates mechanically larger mercury particles, for example by decanting or depositing in special tanks. When the mercury particles are contained in a liquid environment, flocculation can be carried out with the porn of the metal hydroxides contained in the medium or supplied to the environment in the form of salt, the mercury particles grouping during flocculation and then separated in However, sometimes metallic mercury is in the form of particles of particularly small size, which cannot by any means be decanted or deposited over a period of time acceptable from an industrial point of view, or in the form of particles not occluded by metal hydroxides. This is often the case in the treatment of industrial wastewater containing metallic mercury in the form of organic or inorganic compounds, when the purification is carried out by reducing the mercury compound to metallic mercury, e.g. by the action of two metals of different nature immersed in a purified solution with an appropriately selected pH value, these metals being electrically connected inside or outside the liquid phase, the unit is described in Italian Patent No. 826,615. The method disclosed in this specification can be used to obtain quantitative conversions of both organic and inorganic mercury compounds by selecting the metals used for the reduction accordingly ( a metal less noble than hydrogen and carbon or other metal more noble than hydrogen). The described treatment produces metallic mercury, which in some cases can be partially removed from the waste water, usually by flocculation if the particles The mercury is of a size suitable for such treatment. The method according to the invention allows the removal of metallic mercury from the liquid environment containing it, irrespective of the size of the particles and the type of prior treatment of this environment, such as flocculation or coalescence, and consists in maintaining this environment. with activated carbon with a large specific surface. The metallic mercury is quantitatively removed, and the activated carbon, after saturation, is regenerated by a known regeneration operation. The term "activated carbon" means any form of carbon, characterized by a high capacity to adsorb gases, vapors and colloidal solids. of both vegetable and animal origin, are produced by distillation of carbon-containing materials and then appropriate activation. Activations are carried out by heating at high temperature (800-900 ° C), which produces a homogeneous The method of removing metallic mercury particles from the liquid environment containing it consists in contacting this environment with activated carbon with a specific surface area of more than 250 m2 / g - The environment from which the metallic mercury particles are removed is usually an aqueous solution containing several dissolved salts together with a very fine suspension of metallic mercury particles to be removed. Not usually in a device, the integral part of which is at least one column filled with activated carbon with a specific surface of over 250 m * / g. An aqueous solution percolates through the column, the metallic mercury particles being removed from the aqueous medium. A solution resulting from an activated carbon treatment operation containing metal salts such as, for example, iron salts in the case of using a solution treated as described in the Italian patent No. 826615, can also be used for further industrial wastewater purification, e.g. flocculation purification, which is an important advantage of the method according to the invention. Alternatively, when the concentration of metal ions is below the predetermined limit concentration, the solution can be drained without further treatment . Otherwise, if the solution is not used for any particular treatment, it must be sent to a treatment plant to reduce the metal salt concentration therein to an acceptable limit. Industrial wastewater containing various concentrations of metallic mercury is treated with activated carbon with a different surface type. The concentrations used and the results obtained are shown in the table below: Activated carbon with a specific surface area of 1200 m2 / g. Mercury concentration in the supplied sewage (mg / l) 3 4 4.8 5.4 Mercury concentration in the discharged sewage (micrograms ) less than 2 less than 2 less than 2 less than 2 Activated carbon with a specific surface of 15 850 m2 / g Concentration of mercury in the purge 20 Activated carbon with a specific surface of 25 350 m2 / g of wastewater (mg / l ) 2 3 4 incoming waste water (micrograms) less than 2 less than 2 less than 2 Mercury concentration in incoming waste water (mg / l) 2 4 5 Mercury concentration in incoming waste water (micrograms) less than 2 less than 2 less A method of removing metallic mercury particles from a liquid environment containing them, characterized in that the environment is in contact with activated carbon with a specific surface area of more than 250 m2 / g. Koszalin D-48 125 copies A-4 Price PLN 45 PL

Claims (1)

1. Zastrzezenie patentowe Sposób usuwania czastek metalicznej rteci z zawierajacego ja srodowiska cieklego, znamienny tym, ze srodowisko to kontaktuje sie z weglem aktywowanym o powierzchni wlasciwej wynosza¬ cej ponad 250 m2/g. PZGraf. Koszalin D-48 125 egz. A-4 Cena 45 zl PLClaim 1. A method of removing metallic mercury particles from a liquid environment containing them, characterized in that the environment is in contact with an activated carbon with a specific surface area of more than 250 m2 / g. PZGraf. Koszalin D-48 125 copies A-4 Price PLN 45 PL
PL1976192794A 1975-10-03 1976-10-01 Method of metallic mercury removal from liquid medium PL110320B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT27957/75A IT1043119B (en) 1975-10-03 1975-10-03 METHOD FOR REMOVAL OF METALLIC MER CURIO

Publications (1)

Publication Number Publication Date
PL110320B1 true PL110320B1 (en) 1980-07-31

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Country Status (23)

Country Link
US (1) US4093541A (en)
JP (1) JPS5246667A (en)
AT (1) AT356016B (en)
BE (1) BE846883A (en)
CA (1) CA1083050A (en)
CS (1) CS207370B2 (en)
DD (1) DD126916A5 (en)
DE (1) DE2643478A1 (en)
DK (1) DK443576A (en)
ES (1) ES452312A1 (en)
FI (1) FI762768A (en)
FR (1) FR2326220A1 (en)
GB (1) GB1542667A (en)
IE (1) IE43862B1 (en)
IL (1) IL50556A (en)
IT (1) IT1043119B (en)
LU (1) LU75923A1 (en)
NL (1) NL7610931A (en)
NO (1) NO763350L (en)
PL (1) PL110320B1 (en)
PT (1) PT65667B (en)
RO (1) RO69367B (en)
TR (1) TR20143A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4338288A (en) * 1978-09-14 1982-07-06 Mobil Oil Corporation Sorbent for removing metals from fluids
JPH0271892A (en) * 1988-04-19 1990-03-12 Natl Energ Council Removal of substance suspended or dissolved in aqueous medium
JP2649024B2 (en) * 1995-07-27 1997-09-03 太陽石油株式会社 Method for removing mercury from liquid hydrocarbons
US5854173A (en) * 1996-05-31 1998-12-29 Electric Power Research Institute, Inc. Flake shaped sorbent particle for removing vapor phase contaminants from a gas stream and method for manufacturing same
DE19704889C2 (en) * 1997-02-10 1999-11-04 Degussa Process for the removal of mercury from alkali alcoholate solutions
DE10255240A1 (en) 2002-11-26 2004-06-09 Basf Ag Process for the removal of mercury from solutions contaminated with mercury
DE10255239A1 (en) 2002-11-26 2004-06-09 Basf Ag Process for the removal of mercury from solutions contaminated with mercury
DE10302978A1 (en) * 2003-01-25 2004-08-05 Donau Carbon Gmbh & Co. Kg Sorbent and method for removing heavy metals from a gas containing heavy metals
US20090200207A1 (en) * 2006-06-21 2009-08-13 Stephan Hatscher Absorption Composition and Process for Removing Mercury
KR20100133394A (en) * 2008-03-10 2010-12-21 바스프 에스이 Method for removing mercury from hydrocarbon streams
DE102012207115A1 (en) 2012-04-27 2013-10-31 Evonik Degussa Gmbh Dissolution of solutions by ultrafiltration

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3476552A (en) * 1966-09-07 1969-11-04 Mountain Copper Co Of Californ Mercury process
US3873581A (en) * 1971-10-21 1975-03-25 Toms River Chemical Corp Process for reducing the level of contaminating mercury in aqueous solutions
US3897331A (en) * 1974-10-10 1975-07-29 Allied Chem Mercury recovery

Also Published As

Publication number Publication date
AU1824676A (en) 1978-04-06
FI762768A (en) 1977-04-04
AT356016B (en) 1980-04-10
IT1043119B (en) 1980-02-20
US4093541A (en) 1978-06-06
DD126916A5 (en) 1977-08-24
RO69367B (en) 1983-04-30
PT65667A (en) 1976-11-01
IL50556A0 (en) 1976-11-30
JPS5246667A (en) 1977-04-13
IL50556A (en) 1980-03-31
PT65667B (en) 1978-04-12
DE2643478A1 (en) 1977-04-07
FR2326220B1 (en) 1981-10-09
BE846883A (en) 1977-04-01
TR20143A (en) 1980-09-26
CS207370B2 (en) 1981-07-31
RO69367A (en) 1983-04-29
NL7610931A (en) 1977-04-05
ES452312A1 (en) 1978-01-01
IE43862B1 (en) 1981-06-17
GB1542667A (en) 1979-03-21
CA1083050A (en) 1980-08-05
IE43862L (en) 1977-04-03
NO763350L (en) 1977-04-05
LU75923A1 (en) 1977-05-06
ATA731276A (en) 1979-08-15
FR2326220A1 (en) 1977-04-29
DK443576A (en) 1977-04-04

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